A transporter drives his truck for the first 4 hours of his journey at a speed of 70 km/h,and the remaining distance in 6 hours at a speed of 50 km/h. What is the average speed of the truck (in km/h)?
This questions was previously asked in
SSC MTS 13th October 2021 Shift-2
Explanation:
Correct option is 4- 66 km/h
Speed of truck for first 4 hours of journey = 90 km/h
Now,
Speed = Distance/Time
Solution
Distance covered in first four hours = 90 x 4
⇒ 360 km
Distance covered in 6 hours = 6 x 50
⇒ 300 km
Total Distance covered = 360 + 300
⇒ 660 km
Total time = 4 + 6
⇒ 10 hours
Average speed = 660/10
⇒ 66 km
:: Average speed of truck is 66 km/h
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By: santosh